Coordination Compounds - Result Question 53
####60. Which of the following complex ion is not expected to absorb visible light ?
[2010]
(a) $[Ni(CN)_4]^{2-}$
(b) $[Cr(NH_3)_6]^{3+}$
(c) $[Fe(H_2 O)_6]^{2+}$
(d) $[Ni(H_2 O)_6]^{2+}$
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Solution:
(a) $[Ni(CN)_4]^{2-}:$ Number ofunpaired electrons $=0$
$[Cr(NH_3)_6]^{3+}:$ Number of unpaired electrons $=3$
$[Fe(H_2 O)_6]^{2+}:$ Number of unpaired electrons $=4$
$[Ni(H_2 O)_6]^{2+}:$ Number of unpaired electrons $=2$
